Screw



FIG. 1 is a top plan view of a screw showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a side elevational view taken from the right of FIG. 2;

FIG. 4 is a fragmentary rear elevational view, the remainder being the same as FIG. 2;

FIG. 5 is a fragmentary side elevational view taken from the left of FIG. 2, the remainder being the same as FIG. 3;

FIG. 6 is a bottom plan view thereof; and

FIG. 7 is a fragmentary sectional view taken in the direction of the arrows on line 7--7 of FIG. 3. 

The ornamental design for a screw, as shown. 